Sean Penn's Son, Hopper, Arrested for Drug Possession

Law enforcement sources tell TMZ ... Hopper and a woman -- actress Uma von Wittkamp -- were pulled over Wednesday for failing to signal. During the traffic stop, the officer detected drug activity and searched the car.

We're told police say they found 14 grams of marijuana, 4 amphetamine pills and 3 grams of shrooms. The 24-year-old actor was booked for the mushrooms and less than an ounce of marijuana. Uma was booked for the amphetamines, as well as the shrooms.

Hopper has struggled with substance abuse in the past, and last year he publicly credited Sean's tough love approach for helping him get clean.

ABOUT TMZ

CONTACT TMZ

Telepictures and Warner Bros. Entertainment Inc.
may use my email address along with my interests and device data to send me tailored email and other offers
through social media or other sites and apps.

Yes! Telepictures and Warner Bros. Entertainment Inc. may also share those details
with WB/Time Warner
Affiliates so they may send me tailored email and other offers.
Telepictures and Warner Bros. Entertainment Inc. are requesting this consent on behalf of their affiliates,
which will use the information under their respective privacy policies.

Opt out at any time by sending email to
privacy@wb.com, by
mail to "Privacy Group, Warner Bros., 4000 Warner Blvd, Burbank, CA 91522," or by
unsubscribing via a link in the email. By submitting my email address, I agree to the
Terms of Service and I acknowledge
that I have read and understand the Privacy Policy.